Elastic-fluid turbine



Aug. 28, 1923. `1,466,324

. J. WILKINSON ELASTIC vFLUID TURBINE Filed June 7. 1922 Inventor:JamesWl Kl nsorv,

l-lis Alttovneg.

Patented A ug. 28, 1923.

UNITED STATES 1,466,324 PATENT OFFICE.

JAMES WILKINSON, OF LYNN, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRICCOMPANY, .A CORPORATION OF NEW YORK.

ELASTIC-FLUID TURBIN E.

' Application led June 7, 192.2. Serial No. 566,631.

To aZZ/wlwm z't may concern:

'Be it known that I, JAMES WILKINSON, a citizen of the United States,residing at Lynn, in the county of Essex, State of Massachusetts,-havejnvented certain new and useful Improvements in Elastlc-FluidTurbines, of .which...the following is a speciication.

The present invention relates to elastic fluid turbines and has for itsobject to provide an improved structure and arrangement for attachingthe blades or buckets to the carrying member such as a turbine wheel.

For a consideration of what I believe to be novel and my invention,attention is directed to the accompanying description and the claimsappended thereto.

In the drawing, Fig. 1 is a perspective view of a section of a bucketring embodying my invention; Fig. 2 is a perspective view of a portionof a carrying member, and Fig. 3 is a radial sectional view of acompleted structure. I

Referring to the drawing, 5 indicates ,a carrying member, here shown inthe form of a wheel adapted to be fastened to a turbine shaft andcarrying on its periphery a ring of turbine buckets or blades. 6.

According to my invention I provide the carrying member with an annularslot 7 of suitable width and depth and in the opposed side walls of slot7 I provide annular grooves 8 and 8a which are located a suitabledistance from the top of slot 7 Communicating with grooves 8 and 8arespectively are radially extending passages 9 and 9a which arestaggered with respect to each other. Passages 9 and 9 are preferablyspaced apart a distance equal to their length. There are thus providedat the entrance end or top of slot 7, a series of equally spacedstaggered projections 10 and 10a. In the walls of slot 7 are holes 11adapted to receive fastening pins or rivets-12. t

The bucket or blade ring comprises a number of arcuate bucket groups orsections of suitable length. One of these groups or sections is shown inFi 1. It comprises a number of buckets or b ades 6 carried by a base 13.Base 13 has a| web portion 14 of dimensions to t slot 7 and on oppositesides of web portion 14 are spaced projections 15 and 15a which arearranged in staggered relation to 'leach other and are of a size andlength to pass through grooves 9vand 9 and fit grooves 8 and 8a. Theprojections 15 are seen only in Fig. 3, but it will be understood Y thatthey are exactly like projections 15, Fig. 1, and are arranged in thesame manner except that they are staggered with respect to them. In webportion 14 are holes 16 which stand in line with holes 11. Bucket orblade ring groups or sections as shown in Fig. 1 may be formed in anysuitable manner. For example, they may be formed from buckets or bladesand spacing blocks assembled in correct relation to eachv other and thenpermanently united by fusion circumferentially to bring projections 15and 15a under projections 10 and 10, grooves 8 and 8a being ofdimensions to just receive projections 15 and 15a. Pins or rivets 12 arethen inserted to further fasten the bucket groups to the carryingmember.

By the above described arrangement the buckets are assembled on thecarrying member by inserting them radially which from a manufacturingstandpoint possesses advantage over the usual method of passing thebuckets through a lling slot and then sliding them around the wheel. Atthe same time the buckets are held in position by both interlockingshoulders and pins. Since the interlocking shoulders are practicallycontinuous, all the bucket parts are held from radial displacement sothat should any buckets of a group become loose it is still held fromradial dis lacement.

Fastening the buc ets in place by both interlocking shoulders and pinsis of advantage in that it gives a firm, strong anchorinof of thebuckets in which the stresses are weil distributed so that the rim ofthe wheel may be made comparatively small, this latter being animportant consideration in reducing the centrifugal stresses.

In accordance with the provisions of the Patent Statutes, I havedescribed the principle of operation of my invention, together with vtheapparatus which I now consider to Ill .representthe best embodimentthereof, but

ll desire to have it understood that Athe .apparatus shown is onlyillustrative and that the invention'may" be carriedy out by other means.

What l claim as new and desire to secure lby Letters Patent of theUnited Statesis are adaptedl to pass through said staggeredVrrv...passages and be brought into said grofves by a sliding movement.

2. ln an elastic Huid turbine, a carrying member having an annular slot,grooves in the opposed faces of said slot, and staggered passagescommunicating with said grooves, and a bucket group having a Web whichts Maase@ the annular slot in the carrying member, staggered projectionson said web which are adapted to pass throughsaid staggered passages andbe brought into said grooves by a sliding movement, and pins forfastening the Web in the slot. j

'3. In ari-elastic Huid turbine, a carrying member having an annularslot, grooves in the opposed faces of the slot, and staggered passagescommunicating With said grooves, arcuate bucket groups having Webs whichfit the annular slot in the carrying member, and staggered projectionson the Webs which are adapted to 'passthrongh said staggered passages"andwt said grooves, said bucket groups, being adapted to be allassembled on the carrying member by being inserted'` into the slot andthen fastened therein by being slid circumferentially.

lln witness whereof, ll have hereunto set my hand this 3rd day of June,1922.

JAMES

